969 results about "Relay transmission" patented technology

Disclosed is a method in a base station for providing a network access service to terminals. Where one of the terminals is selected as a source terminal and at least one of the other terminals is used as a relay node for relaying communication between the base station and the source terminal. Parameters for relay communication are initialized. A relay communication request message including that the parameters is transmitted. In response to the message, a terminal independently sets and performs the relay communication between the base station and the source terminal. Uplink signals are received from the source and relay terminals. The uplink signals received from the source and relay terminals are combined and decoded. A transmit diversity gain is obtained in uplink transmission of a terminal with a single antenna because relay nodes retransmit the source terminal's signal.

A communications system, apparatus, method, and computer program product for inter-satellite and inter-spacecraft crosslinks (ISL) with non-ISL optimized antennas on spacecraft. The system includes a mobile communications platform that includes an ISL antenna configured to transmit information to a target satellite through a non-ISL antenna of the target satellite. The mobile communications platform is configured to relay transmissions through the non-ISL antenna of the target satellite to another communications platform. The mobile communications platform includes a controller configured to determine a location of the mobile platform; determine whether the target satellite is within communications range; and prepare a signal for relayed transmissions through a non-ISL antenna of the target satellite to another communications platform in a signal format that is decipherable by this other communications platform.

An inter-vehicle communication method according to the present invention performs communication by sequentially relaying transmission information among vehicles. For broadcasting the transmission information to peripheral vehicles, a vehicle transmitting the transmission information designates relay vehicles and causes the relay vehicles to broadcast reception information to peripheral vehicles of the relay vehicles. In order to designate the relay vehicles, the vehicle transmitting the transmission information receives positional information from its peripheral vehicles, identifies branch roads on which the respective peripheral vehicles exist by referring to map information, and designates as relay vehicles peripheral vehicles farthest away from the vehicle transmitting the transmission information on the respective branch roads.

A base station used in a relay transmission system is disclosed. The base station includes a metric provision unit providing a metric indicating radio propagation conditions of a user equipment terminal; a relay information generation unit generating a relay information for the user equipment terminal based on the metric, the relay information indicating whether an uplink signal is to be transmitted via one or more relay stations; a scheduling unit generating an allocation plan of radio resources based on the relay information; and a control signal transmission unit transmitting a control signal including a scheduling information indicating the allocation plan.

Provided is a method and apparatus for a smart home service to which a virtual home gateway is applied. A server may generate a virtual smart home service apparatus through a virtualization technology, and the virtual smart home service apparatus and a gateway may divide and thereby perform a function of an existing gateway. A first terminal, the server, and the gateway may be connected to each other over a first network such as the Internet, and the gateway and a second terminal may be connected to each other over a second network such as a home network. The gateway may relay transmission and reception of data between the first network and the second network.

A method for adopting network code communication in wireless relaying network, improves the relaying ascending transmission efficiency by setting up relaying nodes and using network coding technique. The method includes the following steps: 1) disposing relaying nodes with network coding function in cellular districts, in order to extend signal coverage and be suitable for adopting network coding; 2) a base station self-adaptively determining whether to adopt relay whether to process using network coding to terminals at the relay point; 3) according to the base station feedback information, relay nodes performing data stream processing based on the network coding technique; 4) the base station centralizedly controlling the switch updating processing of network coding: when terminals move in different service districts, the base station updates relay nodes or service districts, amd newly execute network coding processing at novel relay points. The invention adopts network coding operations at relay nodes, so that the invention can respectively perform coding forwarding to the received different routing information, and largely improves relay transmission efficiency and transmission performance of edge users.

The invention provides a configuration method of a cyclic prefix (CP), a base station and a terminal, wherein the method comprises the steps of respectively configuring the CP length of each subframe by the base station, dispatching the terminal in need of the first CP length at the subframe which is configured with the first CP length and dispatching the terminal in need of the second CP length at the subframe which is configured with the second CP length according to the transmission requirement of the terminal. The invention provides a method for flexibly configuring the CP length, not allthe uplink or downlink subframes are necessarily configured to extended CP by using the method for the terminal which supports the multipoint cooperation or relay transmission, however the subframe is respectively configured, part of the subframes are configured to extended CP, the terminal which supports the multipoint cooperation or relay transmission is dispatched on the subframe which is configured with the extended CP, and the terminal is dispatched on the subframe which is configured with the conventional CP by using the common transmission mode, thereby improving the transmission efficiency of the system and saving the resources of the system.

The invention relates to a data relay transmission method applied to a vehicle Ad hoc system, which aims to provide the data relay transmission method having the advantages of low time delay and high reliability for the vehicle Ad hoc network. The method provided by the invention comprises the following steps: a vehicle node receiving the broadcasting data of a source node firstly computes the rebroadcasting probability according to the state information of the vehicle node and the state information of the source node and determines whether the vehicle node becomes a candidate relay node or not; and each candidate relay node computes the retreating time accessed to a channel according to the respective rebroadcasting probability, thereby completing that the candidate relay node in the retreating course finally becomes a relay node and realizing the relay rebroadcasting of the data. The method provided by the invention avoids the broadcasting storm problem because a large quantity of nodes receiving the data rebroadcast the data, reduces the time delay of the data transmission, avoids the problems that a single relay node rebroadcasts the data and the data transmission is stopped once the rebroadcasting fails, improves the reliability of the data transmission and provides the reliable data transmission with low time delay for the application in the vehicle Ad hoc system.

Provided are a method, system, and program for processing a transmission from a first device to a second device. An identification transmission is received including an interface address from the first device. A determination is made as to whether the identification transmission indicates a recognized vendor identifier. An interface address of a third device is returned to the first device in response to determining that the identification transmission includes one recognized vendor identifier, wherein the third device relays transmissions between the first and second devices.

The embodiment of the invention discloses a relay transmission method and a network node. The relay transmission method comprises the following steps of: receiving configuration information of a relay link subframe which is configured in a subframe taking an integral multiple frame as a cycle and has a specific mixed automatic retransmission HARQ time sequence; and performing relay link transmission according to the relay link subframe. In the embodiment of the invention, when the relay transmission is performed according to the selected relay link subframe, the method and the network node satisfy various constraints of an LTEFDD system, and can be backwards compatible with UE in the existing LTE system.

The invention discloses a data distribution system based on a CDN (content distribution network). The data distribution system comprises an access layer device, one or more relay layer devices and one or more margin layer distribution devices, wherein the access layer device is suitable for receiving a broadcasting data packet from a broadcasting source and converting the broadcasting data packet to a transmission data packet of a predetermined format; each relay layer device is suitable for performing relay transmission on the transmission data packet of the predetermined format converted by the access layer device through a uniform transmission protocol; each margin layer distribution device is suitable for receiving the transmission data packet of the predetermined format after relay transmission performed by each relay layer device and converting the transmission data packet of the predetermined format to a data packet of a terminal broadcasting protocol according to a terminal request and distributing the data packet to the terminal. The invention also provides a data distribution method based on the CDN. By utilizing the data distribution system and the data distribution method, the reliability of live stream can be greatly improved, and the transmission efficiency among backbone networks also can be greatly improved.

The present invention discloses a transmission method in a wireless relay system, which jointly transmits data between a source node and a destination node through a plurality of relay stations. These relay stations transmit same data on the same time frequency resources and transmit different data on varied time frequency resources. The destination node demodulates and decodes received superposed signals of the same data transmitted by the RS on the same time frequency resource. In addition, the destination node demodulates and decodes different data transmitted by the RS on the varied time frequency resource and matches demodulated and decoded data on demand and finally acquires the transmitted data. Moreover, the present invention discloses a wireless relay transmission system. The transmission method and the transmission system provided by the present invention can improve link transmission reliability, realize load balance amongst a plurality of relay stations, avoid overload of single relay station and enhance service quality for the destination node.

There is provided a radio communication device capable of suppressing increase of power consumption of a relay station device. In this device, a channel information extraction unit (31) extracts channel information (channel information in the mobile station device of the signal transmitted from the base station device) from the reception signal from a base station device; a sub carrier selection unit (32) selects a sub carrier of low received quality according to the channel information; a relay data extraction unit (33) extracts data to be relay-transmitted according to the selection result in the sub carrier selection unit (32); and a sub carrier allocation unit (35) allocates data to be relay-transmitted to the sub carrier for relay transmission.

A mid-mount mower including a body frame supported above the ground by front wheels and rear wheels, and a mower unit vertically movably suspended from the body frame between the front wheels and rear wheels. The mower unit includes a mower deck having a top board, and a front wall, side walls and a rear wall depending from the top board. The mower deck has a rearwardly opening recess formed in a sideways middle region at a rear end thereof. A mower input shaft is disposed on the top board for transmitting power to the rotary blades juxtaposed inside the mower deck to be rotatable about three vertical axes arranged sideways. The mower input shaft extends longitudinally of the body frame and has a rear connecting end. A PTO shaft is provided in a rear transmission mechanism that drives the rear wheels. The PTO shaft extends longitudinally of the body frame and has a forward connecting end. A relay transmission shaft has one end thereof connected to the connecting end of the mower input shaft through a front universal joint, and the other end connected to the PTO shaft through a rear universal joint. The recess is recessed longitudinally of the body frame to an extent forwardly of the rear universal joint to receive the rear universal joint when the mower unit is raised.

The invention discloses a data transmission method, an apparatus and a terminal device, and relates to the technological field of communication network. According to the invention, voice or video call quality can be improved when the transmission quality of the core network is unstable, particularly in the case of inter-operator. A communication transmission link is established a calling client and a called client; the communication transmission link comprises a point-to-point (P2P) transmission link and a relay transmission link; transmission quality of the P2P transmission link and that of the relay transmission link are detected when the calling client and the called client employ the P2P transmission link transmit audio and video data; the audio and video data is transmitted by switching the P2P transmission link to the relay transmission link when the transmission quality gap value between the P2P transmission link and the relay transmission link is bigger than or equal to a first preset threshold. The invention is suitable for switching transmission links.

A content delivery system wherein an occurrence of a traffic, the value of which is below a predetermined threshold value, can cause stream data to permeate all of the nodes in a community in a given time. In this system, a communication terminal apparatus uses a control part to determine, based on information (a TTL part, a relay part and a content part) established in a content delivery message, a coincidence between user attribute information established in the content part and user attribute information stored in a storage part, thereby deciding whether to execute a content reproduction. Furthermore, in a process of controlling a relay transmission, the control part controls, based on the information of the TTL and relay parts established in the content delivery message, the state of the relay transmission to other nodes based on link information stored in the storage part.

The invention discloses an FTTH network based optical and wireless hybrid access system and a hybrid access method, and relates to the field of optical access. The hybrid access system comprises a GPON (gigabit passive optical network) local-side OLT (optical line terminal) device and an optical wiring unit, wherein the local-side OLT device is connected with the optical wiring unit through an optical fiber link which transmits a digital baseband signal and a wireless analog signal simultaneously; the GPON local-side OLT device comprises sixteen slot positions where PON (passive optical network) interface discs and local-side light carrier radio frequency units are inserted; and when N wireless access channels are in one optical fiber link direction, N is larger than or equal to 1 and smaller than or equal to 7, the local-side OLT device utilizes N local-side light carrier radio frequency units, one local-side light carrier radio frequency unit is taken as a master local-side light carrier radio frequency unit, and the other (N-1) local-side light carrier radio frequency units are taken as cascading local-side light carrier radio frequency units. According to the FTTH network based optical and wireless hybrid access system and the hybrid access method, optical resources of the PON can be reused, a design of a far-end radio frequency module is simplified, the size, the power consumption and the cost are reduced, and by virtue of wireless relay transmission, the wireless access is integrated into the FTTH network.

Disclosed is a method of establishing a network topology capable of carrying out a relay transmission among sub-networks in a backbone network having the plural sub-networks composed of at least one device. The method includes each of sub-master devices controlling communications in the respective sub-networks transmitting an ID request message to other sub-master devices; transmitting a response message from the other sub-master devices to the sub-master device having transmitted the ID request message; each of the sub-master devices assigning an ID to the sub-master device having no ID among the sub-master devices having transmitted the response message; and forming a network topology in accordance with whether or not the response message has been transmitted, and in accordance with the order of ID assignments, after the ID is assigned to all the sub-master devices in the backbone network. The network topology enables reliable communications among the respective sub-networks.

The invention discloses a relay communication system utilizing regenerable energy power supply and an energy-saving mode. The relay communication system is characterized in that traditional power grid energy supplies power for a base station, regenerable energy collected by an energy collecting device supplies power for a relay, and the relay processes received signals and forward the received signals; in a downlink link, the relay periodically sends channel state information and current energy storage to the base station, and the base station determines to select a direct connection transmission mode or a relay transmission mode according to load information, information fed back by the relay and the channel conditions and conducts corresponding downlink resource distribution; in an uplink link, the relay periodically sends the state information of channels from a user to the relay and the current energy storage to the base station, the base station combines the information, the load information and state information, of channels from the relay to the base station and from a user to the base station, obtained by self-estimation to choose a direct connection transmission mode or a relay transmission mode, and conducts corresponding uplink link source distribution. By the adoption of the method, communication quality can be ensured, and non-renewable energy consumption can be saved.

Systems, methods, apparatuses, and computer program products for dynamic provisioning of quality of service (QoS) for end-to-end (E2E) QoS control in device-to-device (D2D) based UE-to-Network relay transmission are provided.

The invention provides a signal wireless electromagnetism transmission system while drilling. The signal wireless electromagnetism transmission system while drilling comprises a drill pipe, a drill collar, a drill tool, an electromagnetic signal emission module, a relay pup joint module and an electromagnetic receiving module. The electromagnetic signal receiving module comprises a loop metal tube, a loop antenna and a receiving circuit, the loop antenna and the receiving circuit are arranged in a loop groove at the bottom of the outer side of the loop metal tube, and the loop metal tube is sleeved on the ground drill pipe. The electromagnetic signal emission module is arranged in a loop groove of the outer side of the drill collar, and the drill collar is connected between the drill tool and the drill pipe. The relay pup joint module comprises a metal drill pipe pup joint, two groups of loop antennas, a relay amplifying circuit and battery, and the metal drill pipe pup joint is connected between the upper section of the drill pipe and the lower section of the drill pipe. The two groups of loop antennas, the relay amplifying circuit and the battery are arranged in a loop groove of the outer side of the metal drill pipe pup joint. By the way of relay, relaying transmission is carried out, transmission distance is not limited, and the data transmission rate is higher.